The tripod mount ring is specially made for Canon EF 70 200mm f 4L USM Lens, Canon EF 70 200mm f 4L IS USM Lens, Canon EF 70 200mm f 4L IS II USM Lens, Canon EF 400mm f 5.6L USM Lens, Canon EF 80 200mm f 2.8L Lens
The lens collar is referencing to and modified from Canon original standard design, bearing is enhanced, details are improved, and added the features of quick release plate
High temperature die casting molding of Aluminum alloy, CNC processing, car paint on surface. Built in 3M film, copper knob and stainless steel anti skid nails
The net weight of this lens support bracket is about 135g, inner diameter is about 65.5mm, width is about 18mm split structure, bottom is 60mm length quick release plate, with 1 4 and 3 8 screw holes
The lens holder bottom is 39mm Arca Swiss fit Quick Release Plate, Compatible with RRS ARCA SWISS WIMBERLEY PMG SUNWAYFOTO BENRO SIRUI MARSACE ISHOOT tripod ball head of Arca 39mm fit.